P0635

Power Steering Control Circuit

Q: Is it safe to drive with P0635?

You can steer, but the wheel may be much heavier without assist, particularly at low speed. Drive carefully and get it fixed soon.

Q: Can I just clear P0635?

It will return until the control circuit or component is repaired. Clearing won't restore lost steering assist.

Steering Generic OBD-II Medium

What it means

P0635 means the ECM detected a fault in the power steering control circuit — the circuit that operates the power steering module, actuator, or control solenoid. Depending on the system, it can reduce or cut power assist, making the wheel feel heavy at low speed. The engine still runs normally, but heavier steering makes this worth fixing promptly.

Medium

Can I keep driving? Steering may become heavy or lose power assist — driveable but tiring, especially at low speed and when parking. Have it checked soon.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Heavier steering, especially at low speed and when parking
Loss or reduction of power steering assist
Power steering warning light on
Check-engine light on

Common causes

Most likely first

Faulty power steering control module or actuatorLikely
Open or short in the power steering control circuit wiringCommon
Corroded or loose connector in the circuitCommon
Faulty power steering pressure sensor or control solenoid (on hydraulic systems)Less often
Less commonly, a faulty ECMLess often

How to diagnose & fix

Work through it in order

Read freeze-frame data to see the conditions when it set.
Inspect the power steering control wiring and connectors for damage or corrosion.
On electric systems, check the steering motor/module; on hydraulic systems, check fluid level and the control solenoid.
Test the control circuit and replace the faulty component.
Repair any wiring faults, then clear the code and re-test.

FAQ

Quick answers

Is it safe to drive with P0635?+

You can steer, but the wheel may be much heavier without assist, particularly at low speed. Drive carefully and get it fixed soon.

Can I just clear P0635?+

It will return until the control circuit or component is repaired. Clearing won't restore lost steering assist.

Read & clear P0635 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX